У вашего броузера проблема в совместимости с HTML5
In this tutorial, you will learn how to use wand in python to convert PDF to Images. Wand is a ctypes-based simple ImageMagick binding for Python(PDF to Image conversion in Python). Wand provides modern interfaces, c-compatible data types and good documentation.
The source code along with solutions to some common issues can be found @ https://hoineki.com/article.php?a=How_to_convert_PDF_to_Image34
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